Distance measuring device and distance measuring method

The present technology relates to a distance measuring device and a distance measuring method that inhibit possible noise in a pixel signal based on reflected light from an object to allow accuracy of distance measurement to be maintained. A distance measuring device according to an aspect of the present technology includes a light emitting section emitting irradiation light, a light receiving section receiving reflected light corresponding to the irradiation light reflected at an object, a calculation section calculating a distance to the object on the basis of a time from emission of the irradiation light until reception of the reflected light, and a control section controlling emission of the irradiation light. The light receiving section includes a plurality of AD converting section AD-converting pixel signals read from the pixels. A first pixel signal and a second pixel signal respectively read from a first pixel and a second pixel of the plurality of pixels forming the light receiving section are AD-converted by an identical AD converting section of the plurality of AD converting sections, the first and second pixels being adjacent to each other. During a process of calculating the time, the calculation section calculates a difference between the first pixel signal and the second pixel signal AD-converted by the identical AD converting section.